Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare this a read-only, idempotent, non-destructive, closed-world operation, so the safety bar is low. The description still adds two things not in the annotations: the call is free, and it requires an API key or a connected account.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

Three compact sentence fragments with the resource and payload front-loaded, then usage, then the exclusion and auth note. Nothing is redundant, though the telegraphic style is terse enough that a little connective wording would read more cleanly.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

There is no output schema, and the description compensates by listing the fields a member record contains plus the auth prerequisite and the zero-cost trait. Pagination or ordering behavior is not mentioned, which is a minor gap for a list endpoint that returns every member.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The tool takes no parameters, so there is no parameter meaning to convey and the baseline applies. The description usefully redirects that space toward the shape of the returned record instead.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description names the resource precisely and enumerates the returned fields (email, name, role, join date, teams), which makes clear this is a read of organization membership. It stops short of explicitly distinguishing itself from the sibling list_teams, so an agent must infer that boundary itself.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

'Use it to find who to share a file with' supplies a concrete use case, and 'Inviting, removing and changing roles is done by a person on the dashboard' rules out the mutation cases an agent might otherwise attempt. There is no explicit pointer to a sibling tool for the adjacent operations, so it is clear rather than exhaustive.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.